36 KCM Series Manual
PVC/CPVC Equivalent Vent Length Calculaon Sheet
Note: Ensure SW 1 in DIPSW 1 is in “OFF” posion if vent length is greater than 21 (6.4m).
1) 90 elbow
5
2) 45 elbow
2.5
3) IPEX Low Prole Terminaon
5
4) IPEX 4" Concentric Terminaon
20
5) IPEX 3" Concentric Terminaon
20
6)
3" Tee Terminaon
5
7)
4" Tee Terminaon
5
8) 3" Snorkel Terminaon
15
9) 4" Snorkel Terminaon
15
10) Length of Straight Secon in feet NA
(add up
lines 1 through